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熊谷本碩（生卒時間不詳，推測為1678年—1701年），生於日本武藏國熊谷，日本江戶時代圍棋棋士，棋力不明，手合使用上手（七段）手合。[參 2]。
詳細生平不詳，為棋聖道策弟子，與桑原道節、本因坊道的、星合八碩、本因坊策元、合稱坊門五虎[參 3][參 4]、道策五弟子，為五人之末[參 5]。並無出賽御城碁紀錄，遺留下棋譜共十六局，其中八局對上師父，剩餘七局對上道節、道的、八碩[參 1]，另有一局對上安井家跡目仙角[參 6]。1697年短時間內本碩與道策讓先對弈七局，前十六手全部相同，被視為研究棋；之後該七局中使用的定石被改良而不再使用[參 5]。
1701年前後去世，得年二十三歲[參 2]。根據去世前手合推測棋力應有上手[註 1]，本碩棋風堅實、大局觀出色[參 7]。
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（第四手白手拔） 右上為古定石，由於白棋其中的幾手棋造成右側黑棋變堅實，但白棋卻沒有得到相當的利益，根據手割，白棋不利。研究棋後，道策與弟子均改為使用左下角的新定石，由於白棋沒有對左側黑棋進行不必要的手段，所以黑棋尚未定型，因此兩分[參 5]。
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本局為1697年8月12日與道策進行的七盤研究棋中的最後一盤，七盤均用白損的古定石開局，也許道策希望多讓本碩幾目[參 5]。布局階段本碩於上方失誤被弄成凝型，且落後手而失去先著效力，但之後雙方表現精彩，尤其本碩在下方攻擊白子而獲取利益，但白同時間在左上方圍到大模樣。圖為第146手時，局勢細微，最後道策白一目勝[參 8]。
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本局為1697年6月26日本碩對道策，為研究棋的第四局，本碩黑一目勝，總計七局本碩贏四局，均為一目勝[參 9]。由於本碩為少數由熊谷出生的高段棋士，因此為熊谷知名人士；位於熊谷的妻沼聖天山，其內的國寶雕刻[參 10]，一處為布袋惠比壽下棋雕刻，上面使用的棋譜即為本局（為上圖中第114手時的局勢）[參 11][參 12][參 13][參 14][參 15]。
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